how to fix P0021 code in Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0021 VVT issues in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, engine oil, oil filter.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Engine Oil

• Sub-steps:
  1. Locate the oil drain plug and place a drain pan underneath.
  2. Remove the drain plug and allow the oil to fully drain.
  3. Replace the oil filter using an oil filter wrench.
  4. Install the drain plug and torque it to manufacturer specifications.
  5. Fill the engine with the recommended type and amount of engine oil.

3. Inspect and Replace VVT Solenoid

• Sub-steps:
  1. Locate the VVT solenoid, typically found on the engine cylinder head.
  2. Disconnect the electrical connector from the solenoid.
  3. Remove the mounting bolts securing the solenoid and take it out.
  4. Install the new VVT solenoid, ensuring it is seated properly.
  5. Reconnect the electrical connector and torque the mounting bolts to the specified value.

4. Check Timing Chain/Belt

• Sub-steps:
  1. Remove any components obstructing access to the timing cover.
  2. Inspect the timing chain/belt for wear or slack.
  3. Adjust the tensioner if necessary or replace the timing chain/belt as needed.
  4. Reassemble any removed components, ensuring proper torque specifications are followed.